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130 The Florists^ Review 



Fbbrdabt 6. 1920 



Greenhouse Heating 



COAL PBODUOTION PICKS UP. 



Bituminous coal production during 

 the week ended January 17 was 11,155,- 

 000 tons, the greatest January week pro- 

 duction in three years, the Geological 

 Survey announced in its weekly report. 

 Up to January 17 the bituminous mines 

 of the country have produced 4,000,000 

 tons more coal than they did last year, 

 despite some still apparent effects of the 

 nation-wide strike evidenced in the form 

 of car shortages. 



WITH HOT WATER OS STEAM. 



We are building a house 36x100 feet. 

 It has 7-foot gutters, with three feet of 

 glass in each side wall, and is a separate 

 house with concrete walls. We have 

 some 2%-inch and 2-inch pipe that we 

 want to use in heating this house and 

 we thought of running one 2% -inch 

 flow down the center of the house and 

 using 2-inch returns under the benches, 

 how many 2-inch returns will be re- 

 quired to heat the house to 60 degrees 

 with an outside temperature of 10 de- 

 grees below zerot R. M. H. — Ind. 



If hot water is to be used as the heat- 

 ing medium, it would not be possible to 

 secure good results with one 2%-inch 

 flow pipe. About 1,500 square feet of 

 radiation will be required for maintain- 

 ing a temperature of 60 degrees in the 

 house described. While it would be pos- 

 sible to get along with four 2^4 -inch 

 flow pipes, or even with three, I should 

 advise that five 2^-inch flows be used. 

 If the amount of 2 ^^ -inch pipe on hand 

 is not sufficient for five flows, some of 

 the 2-inch pipe may be substituted. Two 

 2^-inch and four 2-inch flows would 

 give good results. 



The number of benches is not stated, 

 but I judge that there are about five, 

 with six walks. I suggest running one 

 flow pipe upon each wall plate, another 

 two or three feet below the ridge and 

 the oth rs on the purlin posts. 



Eighteen 2-inch returns will be re- 

 quired. If five flows are used I should 

 use four returns upon each side wall, or 

 under each side bench if they are built 

 against the walls, and should distribute 

 the other returns under the other 

 benches. 



In case steam heat is to be used, 

 although I should prefer to use 1%- 

 inch pipes for the returns, it will answer 

 to put in one 2%-inch overhead flow 

 pipe and ten or eleven 2-inch returns, 

 placing two or three under each bench. 



PIPING WITH SOLID BEDS. 



On the basis of the sketch and data 

 which we enclose concerning our range, 

 what arrangement of piping would you 

 suggest? We shall use solid beds; con- 

 sequently most of the returns will have 

 to be run on the wall, although some 

 can be run on purlin posts if the heat 

 would be better distributed in that way. 

 Would li^-inch pipe make satisfactory 

 returns in this caset We have about 

 800 feet of this on hand and should like 

 to use it if possible. Would you advise 

 the installation of a mercury generatort 

 At what level, in relation to the bottom 

 of the returns, can boilers be set, when 

 a mercury generator is used! We do 

 not want to make the boiler pit any 



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KROESCHELL 



GREENHOUSE SPECIALTIES 



Made in 20 Size* 



HEATING and COOLING are two branches of engineering on 



which we specialize for the greenhouse trade. 



Over thirty years have been devoted by us to the construction and 



designing of boilers and refrigerating apparatus. 



During this period we have furnished and installed heating and 



cooling systems for the most successful greenhouse men in this 



country. 



Tobeless Boiler 



KROESCHELL Boilers are making the most wonderful greenhouse 

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BOILER- 



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 plants 100 H. P. and over. 



18,468.520 sq. ft. of glass was equipped with KROESCHELL Boilers 

 during the past five years. 



Water Tube Steam Boiler 



When in need of refrigeration investigate the Kroeschell System- 

 its high eflSciency and low cost of operation place the Kroeschell 

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Safety 



CO, 



EcoflOfliy 



Send for Boiler or Ice Machine Catalogues. 

 StErte which is wanted. 



BUY DIRECT-FACTORY TO USER PRICES 



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KROESCHELL BROS. CO. 

 KROESCHELL BROS. ICE MACH. CO. 



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444 West Erie Street, ■ 

 CHICAGO, ILL. g 



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